发明授权
- 专利标题： Content reproduction device, content reproduction device control method, content reproduction program, recording medium, and integrated circuit
- 专利标题（中）： 内容再现装置，内容再现装置控制方法，内容再现程序，记录介质和集成电路
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申请号： US12919967申请日： 2009-03-12
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公开(公告)号： US08448259B2公开(公告)日： 2013-05-21
- 发明人: Tomoyuki Haga , Yoshikatsu Ito , Yuichi Futa , Hideki Matsushima , Takayuki Ito
- 申请人： Tomoyuki Haga , Yoshikatsu Ito , Yuichi Futa , Hideki Matsushima , Takayuki Ito
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Wenderoth, Lind & Ponack, L.L.P.
- 优先权： JP2008-087299 20080328
- 国际申请： PCT/JP2009/001120 WO 20090312
- 国际公布： WO2009/119029 WO 20091001
- 主分类号： G06F21/00
- IPC分类号： G06F21/00
摘要：
A content playback device of the present invention includes a playback unit 200 operable to play back a content; a normal storage unit 250 that is not tamper-resistant; a secure storage unit 350 that is tamper-resistant; a first control sub-unit 230 that writes playback records indicating elapsed playback time of the content into the normal storage unit one by one at regular time intervals; and a second control sub-unit 330 that (i) writes monitoring records with respect to the playback records into the secure storage unit 350 one by one at irregular time intervals and (ii) determines that the playback records stored in the normal storage unit 250 have not been tampered with if a prescribed relation is satisfied between a specific time point obtained according to a latest one of the monitoring records and one of the playback records corresponding to the specific time point.